Mixing apparatus



May 31 1927 H. PRILLwl-rz MIXING APPARATUS Fi1ed-Aug. 20, 1925 Patentedi' May 31, 1927. p

UNITED STATES y 1,630,406 PATENT OFFICE.

H ANS PBILLWITZ, 0F FRANKFOBT-ON-THE-IAIN, GERMANY, ASSIGNOR T0 I. G.FAB- BENINDUSTRIE AKTIENGESELLSCHAFT,

MIXING APPARATUS.

Application led August 20, 1925, Serial No. 51,470, and in-ermany August29, 1924.

Tli'is invention relates to improvements in in coptiiuer 12. Owing tothe sucking apparatus for mixing liquids, including aet1o1 1. of themachine, which may bepasemulsions and suspensions with each other, whichapparatus resemble rotary pumps 'or turbines in which u wheel providedwith vaues or blades is rotated by an outer driving mechanism. Theimprovement bears relation to the especial manner of supplying therotary wheel -with the materials to be mixed.

An apparatus of the type described and embodying my invention is showniu the accompanying drawing, in which v Fig. 1 is a verticalcross-section along the driving shaft of the machine;

Fig. 2 is a vertical cross-section through the rotor, and

3 is a diagrammatic side view on a reduced scale of a modification. Y

1 is the casing of the mixer, 2 is the rotor provided with two rows ofvanes or blades 3 and 4. The outer vanes or blades ma)1 be offset withrespect to the inner vanes or blades as shown in Fig. 2. 2 is therotating shaft, 5 illustrates the pipe` for supplying the material ytobe treated.

In the interior of the mixing apparatus the outer diameters of thesupply pipe and the inner row of blades or vanes (or, when more than tworows are employed, the innermost row) are almost equal. The innerdiameter of the discharge pipe 6 is preferably chosen to diier from thatof the supply p 'Plhe front side of the latter is closed by a cover 7and its wall is perforated by slots 8, very close t0 which the blades orvanes 3 rotate. The total cross-section of the said slots preferablyamounts to at least the cross-section ofthe supply pipe, but-it may beincreased or diminished by means of a slotted ring 9, according to thenature of the material under treatment. 10 is a p' provided with avalve1`1 for connecting the interior of casing 1 with a suction pump(not shown). The dimensionsof the casing are reduced as much as possibleso thatonly a little more than the space required for the rotationofthewheel is left.

The apparatus is operated in the followmanner. After the casing has beenone single 4passage through the mixing .sistel. by external pressure, orowing to exterual pressure alone, the mixture is lifted and supplied tothe mixer through pipe 5. The material may be returned to container 1 2through pipe 6 and the treatment contlnued. until the desired intimateunion of the mixture is attained; or the .discharge plpe may beconnected with another vessel or vessels 13, as shown in Fig. 3, and themixture discharged. into these vessels after machine. IVhen a pluralityof liquids is to be supplied to the mixer at the same time, the supplypipe may be connected with a. corrponding number vof supply pipes andcontamers 12.a and 12b for instance (Fig. 3).

The material t0 be mixed is .projected from the slots 8 at the end ofpipe 5in the form of radial jets which are immediately cut ottl by theblades or'vanes of the rotor.

The advantages of my improved apparatus as compared with the knownappliances of similar kind are above all attributable to` the fact thatthe eiliciency as to quantity and Y intimate union of the mlxture ismultiplied. F urthermorev the economy is increased owing to the factthat according to my invention relatively small machines are capable ofconveying and mixing large quantities of material to be treated. Bypropor tionating the cross-sections of the supply pipe and the deliverypipe I may adjustthe conveying action with respect to the mixing actionthus paying attention to the occa- Y owing to the relatively wide slotsin the supply pipe.

I claim 1. Mixing apparatus of the turbine or centrifugal pump type,comprising a casing,

filled with liquid, the rotor is set revolving a paddle-wheel in thesaid casing rotated by a suitable motor. The material to be anexternaldriving mechanism, a supply treated, for ,instance a liquid and a powderpipe having an inner diameter ap roximatto be suspended therein, iscoarsely mixed 'ing the inner diameter of the pa dle-wheel and extendinginto the interior cylindric opening of the said paddlewheel, the end ofthe said supply pipe being provided with a' large number of slots in theproximity of the puddles of the said wheel, and a. pipe extending fromthe delivery side of the'said paddle-wheel. Y

2. Mixing apparatus rof the turbine or centrifugal pump type, comprisinga casing, a puddlewheel in the said casing rotated by an externaldriving lmechanism, a supply pipe having an inner diameter approximat--ing the inner diameter of the paddle-wheel and extending into theinterior 'cylindric opening of the said paddle-wheel, the end of 15 thesaid supply pipe being provided with a large number of slots in theproximity Aof the paddles of the said wheel, and a pipe extending fromthe delivery side of the said paddle-wheel and having a, cross-section20 smaller than the `cross-section of the supply pipe.

.[n testimony whereof I affix my signature.

HANS PBILL\VITZ.

